Boat windshield



FIG. 1 is a top perspective view of a boat windshield showing my new design;

FIG. 2 is a front view;

FIG. 3 is a rear view;

FIG. 4 is a side view, with the opposite side view being a mirror image;

FIG. 5 is a top view; and,

FIG. 6 is a bottom view.

The broken lines shown in FIGS. 1 through 6 are for illustrative purposes and form no part of the claimed design. 

The ornamental design for a "boat windshield", as shown and described. 